Wireless internet connection trouble

[JustMe39]

Feel like such a ditz, sorry!  I just got my daughter a new computer with Windows XP and a wireless card installed, and I already have one wirelessly connected to my computer (which techs configured at the shop, after I brought my SMC router in to them) so I thought I could go on Microsoft, download the instructions and do this one myself, NOT!  I followed the instructions with the Connection Wizard step by step, to no avail.  Is there a site you recommend I use that has instructions? I use Rogers Hi-Speed internet.
Thanks SO much!

[Calum]

What exactly are you trying to achieve here?
Are you trying to connect the new computer to the wireless router, or to the other computer, or what?

[Raptor]

They didn't set it up, they only installed the drivers for you. Setting up a wireless network needs to be done at home due to security and channel settings.

[JustMe39]

I'm trying to connect to MY computer's router, my daughter's computer that has the wireless card.  My other basement computer works wirelessly so I have no idea why I don't know what I'm doing!  

[2k_dummy]

Laptop or desktop? I don't why it makes a difference, but it often does. If its a laptop, enter the machines MAC address in the routers MAC address table. Not to be confused with MAC address filtering, which denies access. Incidentally, an XP machine always tries to rule the roost in a mixed OS network. You might have to make changes to the cards properties. Go to start/run/command and run ipconfig. If the IP address is 169.x.x.x You will have to make some changes.

[GX1_Man]

Some details about the equipment, operating system, and exactly what you tried can be important.

Here's a good link:

http://www.microsoft.com/windowsxp/using/tabletpc/expert/russell_tabletlaptop.mspx

\and here are 13,000,000 others (literally)!

http://www.google.com/search?hl=en&lr=&q=how+to+add+laptop+to+wireless+network